Suggestion for a future replacement of Fervor of Battle
Peak of Performace Damaging an enemy champion with spells or attacks increases all damage you deal by 4% and reduces all damage you take by 2%, up to 16% damage increase and 8% damage reduction. This effect stacks with a interval of 1 second. Ranged champions does not gain the damage reduction bonus.
A keystone that is aimed to bruisers and trades immediate power with a stronger delayed effect, just like the old FoB (although it takes a little bit longer to reach full stack in some champs, it still offers similar power).